777 file format description

Many people share .777 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .777 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .777 files.

Naturally, other applications may also use the .777 file extension. Even harmful programs can create .777 files. Be especially cautious with .777 files coming from an unknown source!

Can't open a .777 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:

example.777

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.

Select a file type in the list and click Change Program.

The .777 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

77

If you find the information on this page useful, please feel free to link to this page.

https://datatypes.net/open-777-files

If you have useful information about the .777 file format, then write to us!